gn: Remove obsolete comment about gyp command.

tools/gn/command_gen.cc

Index: tools/gn/command_gen.cc
diff --git a/tools/gn/command_gen.cc b/tools/gn/command_gen.cc
index b8e5e0fbb81d731b8c48bc106c34704c2fe04b0f..4b7886c59cf1c4fb4603148c6d17d8259d6e1e42 100644
--- a/tools/gn/command_gen.cc
+++ b/tools/gn/command_gen.cc
@@ -89,10 +89,7 @@ const char kGen_Help[] =
     "\n"
     "  See \"gn help\" for the common command-line switches.\n";
 
-// Note: partially duplicated in command_gyp.cc.
 int RunGen(const std::vector<std::string>& args) {
-  base::ElapsedTimer timer;
-
   if (args.size() != 1) {
     Err(Location(), "Need exactly one build directory to generate.",
         "I expected something more like \"gn gen out/foo\"\n"
@@ -100,6 +97,8 @@ int RunGen(const std::vector<std::string>& args) {
     return 1;
   }
 
+  base::ElapsedTimer timer;

[scottmg, 2014/05/21 20:34:42]

i think probably leave this where it was?

[tfarina, 2014/05/21 20:39:44]

OK. Done. 

+
   // Deliberately leaked to avoid expensive process teardown.
   Setup* setup = new Setup();
   if (!setup->DoSetup(args[0]))